<template>
  <div class="certification">
   <header-bar :text="title" :left="left"></header-bar>
    <div v-if="status==3">
        <div class="cert_img" style="margin-top:15px;">
            <div class="certimg_box">
                <div @click="handClik(1)">
                    <div class="certimg_box_header">第一步：请拍摄身份证正面</div>
                    <div class="cerimg-content">
                        <div class="cert_show">  
                            <div class="cert_picture" :style="headerImage1?'backgroundImage:url('+headerImage1+')':'backgroundImage:url('+heimg1+')'"><span v-if="!headerImage1">+</span></div>
                        </div>
                        <div class="cert_file">  
                            <input type="file" id="upload1" accept="image/*" capture='camera' @change="upload">
                        </div> 
                    </div>  
                    
                </div>
            <div @click="handClik(2)">
                    <div class="certimg_box_header">第二步：请拍摄身份证反面</div>
                    <div class="cerimg-content">
                        <div class="cert_show">  
                            <div class="cert_picture" :style="headerImage2?'backgroundImage:url('+headerImage2+')':'backgroundImage:url('+heimg2+')'"><span v-if="!headerImage2">+</span></div>
                        </div>
                    </div>  
                    <div class="cert_file">  
                        <input type="file" id="upload2" accept="image/*" capture='camera' @change="upload">
                    </div>  
                </div>
                <div @click="handClik(3)">
                    <div class="certimg_box_header">第三步：请手持身份证和手写当前日期拍摄</div>
                    <div class="cerimg-content">
                        <div class="cert_show">  
                            <div class="cert_picture" :style="headerImage3?'backgroundImage:url('+headerImage3+')':'backgroundImage:url('+heimg3+')'"><span v-if="!headerImage3">+</span></div>
                        </div>
                        <div class="cert_file">  
                            <input type="file" id="upload3" accept="image/*" capture='camera' @change="upload">
                        </div>  
                    </div>  
                    
                </div>
            </div>
        </div>
        <div class="certBtnbg">
            <button :class="{certBtn:headerImage1&&headerImage2&&headerImage3}" @click="postAuthentication(headerImage1&&headerImage2&&headerImage3)">提交审核</button>
        </div>
        </div>
        <div v-if="status==2" style="background:#fff;height:50px;text-align:center;line-height:50px;font-weight:500;">
        身份已认证
        </div>
        <div v-if="status!=3" style="background:#fff;height:50px;text-align:center;line-height:50px;font-weight:500;">
        身份正在审核中
        </div>
  </div>
</template>
<script>
import qs from "qs";
import headerBar from "./main/header";
import { Header, Toast } from "mint-ui";
import { mapState, mapGetters, mapMutations, mapActions } from "vuex";
import Exif from "exif-js";
export default {
  name: "Certification",
  data() {
    return {
      msg: "",
      headerImage1: "",
      heimg1: require("../assets/zheng.png"),
      headerImage2: "",
      heimg2: require("../assets/fan.png"),
      headerImage3: "",
      heimg3: require("../assets/shouchi.png"),
      picValue: "",
      status: "",
      title: "身份认证",
      activeIndex: 1,
      resUrl:"",
      left: {
        status: true
      }
    };
  },
  components: {
    headerBar,
  },
  methods: {
      cutSuccess(url){
          var that = this;
           that["headerImage" + that.activeIndex] = url;
           console.log(this.headerImage1)
      },
    handClik(index) {
      this.activeIndex = index;
    },
    back() {
      this.$router.go(-1);
    },
    upload(e) {
      let files = e.target.files || e.dataTransfer.files;
      if (!files.length) return;
      this.picValue = files[0];
      if (this.activeIndex == 1) {
        this.imgPreview(this.picValue);
      } else if (this.activeIndex == 2) {
        this.imgPreview(this.picValue);
      } else {
        this.imgPreview(this.picValue);
      }
    },
    imgPreview(file) {
      let self = this;
      let Orientation;
      //去获取拍照时的信息，解决拍出来的照片旋转问题
      Exif.getData(file, function() {
        Orientation = Exif.getTag(this, "Orientation");
      });
      // 看支持不支持FileReader
      if (!file || !window.FileReader) return;

      if (/^image/.test(file.type)) {
        // 创建一个reader
        let reader = new FileReader();
        // 将图片2将转成 base64 格式
        reader.readAsDataURL(file);
        // 读取成功后的回调
        reader.onloadend = function() {
          let result = this.result;
          let img = new Image();
          img.src = result;
          //判断图片是否大于100K,是就直接上传，反之压缩图片
          if (this.result.length <= 100 * 1024) {
                // self.resUrl = this.result;
                self["headerImage" + self.activeIndex] = this.result;
                self.postImg();
          } else {
            img.onload = function() {
              let data = self.compress(img, Orientation);
            //   self.resUrl = data;
              self["headerImage" + self.activeIndex] = data;
              self.postImg();
            };
          }
        };
      }
    },
    postImg() {
      //这里写接口
    },
    rotateImg(img, direction, canvas) {
      //最小与最大旋转方向，图片旋转4次后回到原方向
      const min_step = 0;
      const max_step = 3;
      if (img == null) return;
      //img的高度和宽度不能在img元素隐藏后获取，否则会出错
      let height = img.height;
      let width = img.width;
      let step = 2;
      if (step == null) {
        step = min_step;
      }
      if (direction == "right") {
        step++;
        //旋转到原位置，即超过最大值
        step > max_step && (step = min_step);
      } else {
        step--;
        step < min_step && (step = max_step);
      }
      //旋转角度以弧度值为参数
      let degree = step * 90 * Math.PI / 180;
      let ctx = canvas.getContext("2d");
      switch (step) {
        case 0:
          canvas.width = width;
          canvas.height = height;
          ctx.drawImage(img, 0, 0);
          break;
        case 1:
          canvas.width = height;
          canvas.height = width;
          ctx.rotate(degree);
          ctx.drawImage(img, 0, -height);
          break;
        case 2:
          canvas.width = width;
          canvas.height = height;
          ctx.rotate(degree);
          ctx.drawImage(img, -width, -height);
          break;
        case 3:
          canvas.width = height;
          canvas.height = width;
          ctx.rotate(degree);
          ctx.drawImage(img, -width, 0);
          break;
      }
    },
    compress(img, Orientation) {
      let canvas = document.createElement("canvas");
      let ctx = canvas.getContext("2d");
      //瓦片canvas
      let tCanvas = document.createElement("canvas");
      let tctx = tCanvas.getContext("2d");
      let initSize = img.src.length;
      let width = img.width;
      let height = img.height;
      //如果图片大于四百万像素，计算压缩比并将大小压至400万以下
      let ratio;
      if ((ratio = width * height / 4000000) > 1) {
        console.log("大于400万像素");
        ratio = Math.sqrt(ratio);
        width /= ratio;
        height /= ratio;
      } else {
        ratio = 1;
      }
      canvas.width = width;
      canvas.height = height;
      //        铺底色
      ctx.fillStyle = "#fff";
      ctx.fillRect(0, 0, canvas.width, canvas.height);
      //如果图片像素大于100万则使用瓦片绘制
      let count;
      if ((count = width * height / 1000000) > 1) {
        console.log("超过100W像素");
        count = ~~(Math.sqrt(count) + 1); //计算要分成多少块瓦片
        //            计算每块瓦片的宽和高
        let nw = ~~(width / count);
        let nh = ~~(height / count);
        tCanvas.width = nw;
        tCanvas.height = nh;
        for (let i = 0; i < count; i++) {
          for (let j = 0; j < count; j++) {
            tctx.drawImage(
              img,
              i * nw * ratio,
              j * nh * ratio,
              nw * ratio,
              nh * ratio,
              0,
              0,
              nw,
              nh
            );
            ctx.drawImage(tCanvas, i * nw, j * nh, nw, nh);
          }
        }
      } else {
        ctx.drawImage(img, 0, 0, width, height);
      }
      //修复ios上传图片的时候 被旋转的问题
      if (Orientation != "" && Orientation != 1) {
        switch (Orientation) {
          case 6: //需要顺时针（向左）90度旋转
            this.rotateImg(img, "left", canvas);
            break;
          case 8: //需要逆时针（向右）90度旋转
            this.rotateImg(img, "right", canvas);
            break;
          case 3: //需要180度旋转
            this.rotateImg(img, "right", canvas); //转两次
            this.rotateImg(img, "right", canvas);
            break;
        }
      }
      //进行最小压缩
      let ndata = canvas.toDataURL("image/jpeg", 0.1);
      tCanvas.width = tCanvas.height = canvas.width = canvas.height = 0;
      return ndata;
    },
    postAuthentication(g) {
      if (g) {
        let para = {
          id: this.pageInfo.userinfo.id,
          username: this.$route.query.username,
          userid: this.$route.query.userid,
          files: this.headerImage1,
          files2: this.headerImage2,
          files3: this.headerImage3
        };
        this.$ajaxPost("authentication", para).then(res => {
          Toast({
            message: res.msg,
            position: "bottom",
            duration: 5000
          });
          if (res.code == 200) {
            this.initUserinfo();
          }
        });
      } else {
        Toast({
          message: "请填写完整信息！",
          position: "bottom",
          duration: 5000
        });
      }
    },
    initUserinfo() {
      if (!util.getLocalStorage("userinfo")) {
        this.$ajaxGet("userInfo", {
          id: this.$route.query.id,
          token: this.$route.query.token
        }).then(res => {
          this.pageInfo.userinfo = res.data;
          util.setLocalStorage(
            "userinfo",
            JSON.stringify(this.pageInfo.userinfo)
          );
          window.history.go(-2);
          //   this.$router.back();
        });
      }
    }
  },
  mounted() {
    this.status = this.pageInfo.userinfo.status;
  },
  computed: {
    ...mapState(["pageInfo"])
  }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
@import url("../../static/css/certification.css");
</style>
